单项选择题

Passage Three
Questions 32 to 35 are based on the passage you have just heard.

A．They can be bred in any conditions.
B．They produce oxygen.
C．They can easily be carried in spaceships.
D．They are organisms.
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单项选择题
By what way does RealNetworks attempt to prevent Microsoft’s ambitions
A．Publishing the source code.
B．Using RealNetworks’ achievements.
C．Protecting intellectual property.
D．Accusing of Microsoft.
填空题
Why could American economy become the strongest in the world
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